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- import streamlit as st
- import pickle
- import pandas as pd
- import json
- import base64
- import uuid
- import re
- # import jupytext
- # from bokeh.models.widgets import Div
- # import math
- import importlib.util
- def import_from_file(module_name: str, filepath: str):
- """
- Imports a module from file.
- Args:
- module_name (str): Assigned to the module's __name__ parameter (does not
- influence how the module is named outside of this function)
- filepath (str): Path to the .py file
- Returns:
- The module
- """
- spec = importlib.util.spec_from_file_location(module_name, filepath)
- module = importlib.util.module_from_spec(spec)
- spec.loader.exec_module(module)
- return module
- def notebook_header(text):
- """
- Insert section header into a jinja file, formatted as notebook cell.
- Leave 2 blank lines before the header.
- """
- return f"""# # {text}
- """
- def code_header(text):
- """
- Insert section header into a jinja file, formatted as Python comment.
- Leave 2 blank lines before the header.
- """
- seperator_len = (75 - len(text)) / 2
- seperator_len_left = math.floor(seperator_len)
- seperator_len_right = math.ceil(seperator_len)
- return f"# {'-' * seperator_len_left} {text} {'-' * seperator_len_right}"
- def to_notebook(code):
- """Converts Python code to Jupyter notebook format."""
- notebook = jupytext.reads(code, fmt="py")
- return jupytext.writes(notebook, fmt="ipynb")
- def open_link(url, new_tab=True):
- """Dirty hack to open a new web page with a streamlit button."""
- # From: https://discuss.streamlit.io/t/how-to-link-a-button-to-a-webpage/1661/3
- if new_tab:
- js = f"window.open('{url}')" # New tab or window
- else:
- js = f"window.location.href = '{url}'" # Current tab
- html = '<img src onerror="{}">'.format(js)
- div = Div(text=html)
- st.bokeh_chart(div)
- def download_button(object_to_download, download_filename, button_text):
- """
- Generates a link to download the given object_to_download.
- From: https://discuss.streamlit.io/t/a-download-button-with-custom-css/4220
- Params:
- ------
- object_to_download: The object to be downloaded.
- download_filename (str): filename and extension of file. e.g. mydata.csv,
- some_txt_output.txt download_link_text (str): Text to display for download
- link.
- button_text (str): Text to display on download button (e.g. 'click here to download file')
- pickle_it (bool): If True, pickle file.
- Returns:
- -------
- (str): the anchor tag to download object_to_download
- Examples:
- --------
- download_link(your_df, 'YOUR_DF.csv', 'Click to download data!')
- download_link(your_str, 'YOUR_STRING.txt', 'Click to download text!')
- """
- # if pickle_it:
- # try:
- # object_to_download = pickle.dumps(object_to_download)
- # except pickle.PicklingError as e:
- # st.write(e)
- # return None
- # if:
- if isinstance(object_to_download, bytes):
- pass
- elif isinstance(object_to_download, pd.DataFrame):
- object_to_download = object_to_download.to_csv(index=False)
- # Try JSON encode for everything else
- else:
- object_to_download = json.dumps(object_to_download)
- try:
- # some strings <-> bytes conversions necessary here
- b64 = base64.b64encode(object_to_download.encode()).decode()
- except AttributeError as e:
- b64 = base64.b64encode(object_to_download).decode()
- button_uuid = str(uuid.uuid4()).replace("-", "")
- button_id = re.sub("\d+", "", button_uuid)
- custom_css = f"""
- <style>
- #{button_id} {{
- display: inline-flex;
- align-items: center;
- justify-content: center;
- background-color: rgb(255, 255, 255);
- color: rgb(38, 39, 48);
- padding: .25rem .75rem;
- position: relative;
- text-decoration: none;
- border-radius: 4px;
- border-width: 1px;
- border-style: solid;
- border-color: rgb(230, 234, 241);
- border-image: initial;
- }}
- #{button_id}:hover {{
- border-color: rgb(246, 51, 102);
- color: rgb(246, 51, 102);
- }}
- #{button_id}:active {{
- box-shadow: none;
- background-color: rgb(246, 51, 102);
- color: white;
- }}
- </style> """
- dl_link = (
- custom_css
- + f'<a download="{download_filename}" id="{button_id}" href="data:file/txt;base64,{b64}">{button_text}</a><br><br>'
- )
- # dl_link = f'<a download="{download_filename}" id="{button_id}" href="data:file/txt;base64,{b64}"><input type="button" kind="primary" value="{button_text}"></a><br></br>'
- st.markdown(dl_link, unsafe_allow_html=True)
- # def download_link(
- # content, label="Download", filename="file.txt", mimetype="text/plain"
- # ):
- # """Create a HTML link to download a string as a file."""
- # # From: https://discuss.streamlit.io/t/how-to-download-file-in-streamlit/1806/9
- # b64 = base64.b64encode(
- # content.encode()
- # ).decode() # some strings <-> bytes conversions necessary here
- # href = (
- # f'<a href="data:{mimetype};base64,{b64}" download="{filename}">{label}</a>'
- # )
- # return href
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